package com.sky.aspect;

import com.sky.anno.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 *自定义公共字段自动填充切面类
 * */
@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    @Before("@annotation(com.sky.anno.AutoFill)")
    public void autoFill(JoinPoint joinPoint) {
        // 拿到注解，判断注解属性
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();// 要拿注解，先拿到方法签名
        Method method = signature.getMethod(); // 得到方法对象
        AutoFill annotation = method.getAnnotation(AutoFill.class); //得到注解对象
        OperationType operationType = annotation.value(); // 获取注解属性
        // 得到参数
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }
        Object entity = args[0]; // 拿到实体对象
        try {
            if (operationType == OperationType.INSERT) {
                // 新增方法，通过反射补充
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setCreateTime.invoke(entity,LocalDateTime.now());
                setUpdateTime.invoke(entity,LocalDateTime.now());
                setCreateUser.invoke(entity, BaseContext.getCurrentId());
                setUpdateUser.invoke(entity, BaseContext.getCurrentId());

            }else if (operationType == OperationType.UPDATE) {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(entity,LocalDateTime.now());
                setUpdateUser.invoke(entity, BaseContext.getCurrentId());
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}
